Chemical Engineering Practice

CEP: Process Automation Corner - Process Simulation and Process Control

September
2013
Process Automation Corner
Terry McMahon
Chemical engineers have been practicing process simulation since the advent of the profession in the early 20th century. It was called process design and inevitably involved simplifying assumptions, including that steady-state process conditions had...

Determining Discharge Rates of Particulate Solids

May
2016
Fluids and Solids Handling
Shrikant Dhodapkar, Karl V. Jacob, Madhusudhan Kodam
Many factors affect the flowrate of bulk solids. This article reviews the underlying physics of solids flow and explains how to calculate the discharge rate of solids from processing and handling equipment.

Modeling Reactive Absorption

January
2009
Reactions and Separations
Eugeny Kenig, Panos Seferlis
Effective modeling of reactive absorption enhances system design, improves experiment planning for parameter-estimation, and facilitates process operation and control decisions.

SBE Special Section: Biopharmaceuticals - Continuous Processing in Upstream Operations

December
2015
SBE Special Section
Chun Chen, Chetan T. Goudar, Huong Le
Perfusion technology offers many benefits over fed-batch processing, such as reducing the size of the bioreactor, which reduces capital costs and enables the use of single-use bioreactor technology. Despite these advantages, a shift to continuous perfusion will likely be gradual.

Introduction to Fluidization

November
2014
Back To Basics
Raymond Cocco, S. B. Reddy Karri, Ted Knowlton
Fluidized beds offer excellent heat transfer, and have the unique ability to move a wide range of solid particles in a fluid-like fashion. This article explains the basics of fluidization theory and outlines how to design a typical fluidized bed.

Understand the Basics of Membrane Filtration

April
2013
Back To Basics
Hua Wang, Hongyi Zhou
Membrane filtration is an integral part of many industrial processes, as it is often more environmentally sustainable and cost-effective than other separation technologies

Process Control for Microreactors

August
2001
Instrumentation
Don  Humbert, Lech  Znamirowski, Olgierd A. Palusinski, Sarma Vrudhula
Field-programmable analog arrays coupled with microreactor technology promise to change the way plants are built, as well as the methods by which their processes are designed and controlled.

Understand Pilot-Plant Design Specifications

May
2016
Plant Design
Adam Whalley, P.Eng.,
Although pilot- and commercial-scale plants may appear similar, they must be designed with different objectives in mind. Find out how the design criteria for pilot and commercial plants differ, and why commercial specifications should not be applied to pilot plants.

Put More Punch Into Catalytic Reactors

March
2003
Reactions and Separations
Ed Fontes, Olof Hernell, Phil Byrne
Using equation-based modeling to design these reactors can optimize their efficiency and throughput.

Reduce Piloting Time and Cost

July
2011
Process Development
David A. Berg, Michael T. Cleary
Pilot-scale experimentation is essential to establish a sound foundation for a new chemical processing unit. These best practices can reduce the time and cost involved in process development.

Big Data Analytics: Meet the Authors

March
2016
Special Section
Richard D. Braatz / Leo H. Chiang / Lloyd F. Colegrove / Salvador GarcÍa Muñoz / Chaitanya Khare / John F. MacGregor / Marco S. Reis / Mary Beth Seasholtz / David White

Patent Update: Can a Patent Be Infringed Before It Issues?

June
2016
Patent Update
Henry Heines
How long does a U.S. utility patent remain in force? If asked this question, many might say 20 years. This is not correct, however. The term of a patent is the period of time extending from the issue date of the patent to 20 years from the date on...

Prevent Caking of Bulk Solids

April
2016
Fluids and Solids Handling
Greg Mehos, P.E.
Understanding the mechanisms behind caking, identifying key process variables and product specifications, and testing samples to predict the increase in cohesive strength of a powder over time are key to preventing and solving caking problems.

2019 AIChE Annual Meeting

November 10-15, 2019
The AIChE Annual Meeting is the premier educational forum for chemical engineers interested in innovation and professional growth. Academic and industry experts will cover wide range of topics relevant to cutting-edge research, new technologies, and emerging growth areas in chemical engineering.

Hybrid Cell Culture Models for Efficient Process Development

Conference Presentation
AIChE Annual Meeting
Thursday, November 12, 2015 - 3:15pm-5:45pm
Cell culture processes are dynamic systems governed by a large number of influential and highly interacting process variables. Despite the stringent...

Dynamic Modeling and Advanced Control of Tablet Press

Conference Presentation
AIChE Annual Meeting
Thursday, November 12, 2015 - 12:30pm-3:00pm
The tablet press is one of the most critical but least understood unit operation involved in both batch and continuous tablet manufacturing process...

Optimizing LNG Production Via Boil Off Gas System Design

Conference Presentation
AIChE Annual Meeting
Wednesday, November 11, 2015 - 12:30pm-3:00pm
Optimizing LNG Production via Boil Off Gas System Design John Ergina – Technical Professional – Process, KBR Sumit Sharma – Senior Technical...

Hydrolysis of Ddg

Conference Presentation
AIChE Annual Meeting
Wednesday, November 11, 2015 - 12:30pm-3:00pm
Liquid hot water (LHW) extraction was used as a pretreatment method to separate the hemicellulose fraction from dried distiller’s grain with solubles...

Hydrolysis Kinetics of Woody Biomass: Surface Renewal

Conference Presentation
AIChE Annual Meeting
Wednesday, November 11, 2015 - 8:30am-11:00am
Woody biomass is known to be composed of three major components: cellulose, lignin and hemicellulose. Cellulose is the most stable natural polymer in...

Democratizing Fossil Fuel Conversion

Conference Presentation
AIChE Annual Meeting
Tuesday, November 10, 2015 - 12:30pm-3:00pm
Do you have a billion dollars? Neither do most of the 6 million companies in the Unites States. In fact, less than 10 companies in the U.S. can...

The Travelling Fluidized Bed Project: Working Together

Conference Presentation
AIChE Annual Meeting
Tuesday, November 10, 2015 - 8:30am-11:00am
John Chen had a strong attachment to “challenge problems” to evaluate the ability of models and CFD codes to accurately predict complex fluidization...

Alternative Sampling Densities in Non-Uniform Sampling

Conference Presentation
AIChE Annual Meeting
Monday, November 9, 2015 - 3:15pm-5:45pm
Non-uniform sampling (NUS) is more widely practiced, but many implementations either do not weight the distribution of samples, or follow exponential...

Water Desalination By Shock Electrodialysis

Conference Presentation
AIChE Annual Meeting
Monday, November 9, 2015 - 8:30am-11:00am
The development of cost and energy efficient water purification systems, specifically desalination systems, is one of the most critical engineering...

Room Temperature Shape Memory Polymers

Conference Presentation
AIChE Annual Meeting
Monday, November 9, 2015 - 8:30am-11:00am
Temperature controlled shape memory polymers can be synthesized via a facile method using long chain fatty acid and cross-linked natural rubber. For...

Flare Regulatory Trends and Impact on Ethylene Manufacture

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Thursday, April 30, 2015 - 8:30am-9:00am
Global attention on improving oil and gas, refinery, petrochemical, and related industrial flaring practices continues its forward advance intimately...

Impact of Control Valve Performance on Control Performance

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, April 29, 2015 - 2:45pm-3:00pm
A significant amount of time is often spent specifying and selecting the proper control valve for the application. However, this effort is generally...

Regulators Versus Control Valves: What's the Best Fit?

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, April 29, 2015 - 1:30pm-2:15pm
This session will review the selection criteria for consideration of pressure regulators vs. control valves for uses on various applications to...

Mitigating Variable TDS Levels in Wastewater Biotreatment

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, April 29, 2015 - 10:45am-11:15am
Wastewaters characterized by elevated Total Dissolved Solids (TDS) levels and high organic content are produced by food, petroleum, and petrochemical...

Recent Trends in the Removal of Sulfate through Precipitation

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, April 29, 2015 - 10:15am-10:45am
Removal of Sulfate through Precipitation Many mines have very high sulfate concentrations in their waste water due to the sulfides in the ore...

Analysis of the Capabilities of Cybersecurity Defenses

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Wednesday, April 29, 2015 - 9:30am-10:00am
The threats to our critical infrastructure continue to evolve. As new cyberattacks are created and discovered, it is incumbent upon us to evaluate...

Robotic Convection Bank Cleaning

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Tuesday, April 28, 2015 - 2:45pm-3:15pm
Ethylene cracking heaters like other box fired heaters in the refining and petrochemical industry represent a significant investment in a plant...

Refiners Meet the Challenges in a Changing Environment

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Tuesday, April 28, 2015 - 2:30pm-3:00pm
Tom Hogan, Senior Vice President of Turner, Mason & Co., will discuss the refinery responses to a rapidly changing environment. Expanding...

Tier 3 Vehicle Emissions and Fuel Standards Compliance

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Tuesday, April 28, 2015 - 1:30pm-2:00pm
Tier 3 Vehicle Emissions and Fuel Standards Compliance - A Sustainability Perspective Jacqueline Sibblies, PE Environmental Compliance Consulting P.O...

Alarm Management Gap Analysis and Improvement at NOVA Chemicals

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Tuesday, April 28, 2015 - 8:00am-8:30am
Alarm Management Gap Analysis and Improvement at NOVA Chemicals Doug Lutz , Principal Process Automation Engineer, NOVA Chemicals Corp., Joffre,...

Creating Maximizing Value with FCC Feeds from Opportunity Crudes

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Tuesday, April 28, 2015 - 8:00am-8:30am
In today’s competitive refining landscape, refiners can take advantage of processing lower cost opportunity crudes to improve margins. Two very...

Fischer-Tropsch Synthesis: Where We Are and Where We May GO

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Monday, April 27, 2015 - 4:00pm-4:30pm
The Germans followed a simple plan when they scaled up the Fischer-Tropsch (FT) synthesis to the commercial level. For the reactor, they set a simple...

Demonstrating Separation and Independence of Automated Systems

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Monday, April 27, 2015 - 4:00pm-4:30pm
Layers of Protection Analysis (LOPA) exposes the role that automation plays in causing initiating events and in responding to the resulting abnormal...

A Tutorial on Model Based Loop Tuning

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Monday, April 27, 2015 - 3:30pm-4:00pm
This presentation provides a tutorial on tuning PID process controllers using the Lambda process model based tuning methodology. This tuning...

Brayton Refrigeration Cycle for Small Scale LNG Plants

Conference Presentation
AIChE Spring Meeting and Global Congress on Process Safety
Monday, April 27, 2015 - 1:30pm-2:00pm
Liquefying natural gas is an industrial process of great importance with the current worldwide production capacity of about 300 million tonnes per...

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